differences. This gives the unit an altitude resolution smaller than 0.5m with sample rates as low as 0.1s.
Since atmospheric pressure changes over time, these changes will affect your measurements. For this
reason, long term measurements may not be precise enough. However, the altitude for short term flights,
which are common in R/C aircraft, can be recorded very precisely.
The measured altitude is stored in the high capacity internal memory with which allows approx. 15 hours
of recording with the fastest sampling rate (0.1s).
After the Altis v4 is connected to a power supply, it will initialize in the first 3s. During initialization, the
reference altitude and a zero throttle level are measured. Note: It is necessary to keep the throttle on
your R/C transmitter turned off during this phase. It is recommended to set the initial altitude
before each flight by disconnecting and re-connecting the power supply.
4. Hardware description
Connectors of your Altis v4
Your Altis v4 has 5 connectors. They are shown in Fig 1.
IN – input signal from the R/C receiver. Power to Altis v4 is provided from
the receiver via this connector
OUT – output signal to ESC (Electronic Speed Control)
USB micro – Connects the Altis v4 to a computer via USB
COM A, COM B – Molex connectors for connection with telemetry equipped receivers as well as
future additional features
Wire color Signal
brown Ground
red Positive power supply
orange R/C signal
Table 1: Colors of the connector wires
AerobTec Altis v4 User Manual 4
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